how do i change the bearings ?

It really depends on how capable you are. The hub carrier assembly needs to be removed from the car.The bearings will most likely be a double ball bearing type, ideally they should be pressed out(using a hydraulic press) & the new one pressed back in, but if you know how, you can drift them out using suitable drifts & large hammer. If in doubt leave it to someone who knows how!

jim
July 2010